![]() Obviously there aren’t 4 polarities in electricity but they could just separate them spacially one way or another. How’s that done? Different polarity? It’ll be great if they get CMYK going. I’m often bugger-all help to anyone, but sadly I can’t charge hundreds of pounds per hour for that. You could even steal the real ones, and dump them somewhere else in the shop so you haven’t properly stolen it I am not a lawyer. ![]() This wasn’t the point of the article at all! But still that’s what naughty people might do once the protocol’s figured out, assuming there’s no encryption, which would make it the supermarket’s liability.Īnother option would be to put your own tags out, disguised as legitimate ones. So the shop could refuse to sell these atrocious bargains, customers will get pissed off and start quoting made-up laws, and to be even worse, you could change the price BACK while they’re arguing! Technically it’s an “invitation to treat”, the contract only starts once you’ve swapped money for the item. Legally a shop isn’t bound to sell anything at the price advertised. You could also create chaos by changing prices drastically. If there’s no prices, you can’t really run a supermarket.Īctually that brings to mind the terrible amount of fun you could have, if these things aren’t using encryption, wandering round with a computer in your jacket, transmitting bits of pr0n in barely-legible 1-bit mode, would be possible. It’s no good if you need to pay a geek to hang around every day in case the system breaks. And maybe they weren’t as reliable as paper. So yeah, they experimented with E-ink but it didn’t bring the savings they wanted, or else just took too long to amortise the capital outlay of buying the system. Do they have a little printer than can produce sticky labels on-site? If that isn’t patented btw I’m having it. Most of the employees, and it’s the same in Aldi, walk around with powerful computers in their hand. So maybe this was an experiment to see if it’s profitable to pay more for E-ink rather than just using paper. Or maybe this was an experiment, I think Netto quit the UK so I haven’t been in one for a few years. Or they found asbestos in the supermarket, and nobody’s willing to pay to clean it, or else it’s just not worth cleaning it. Netto, Aldi, and Lidl all operate on very tight profit margins, so maybe it’s become uneconomical and being closed. Or else (everyone join the list!) the supermarket is being closed down. Posted in Parts Tagged e-ink, e-ink display, e-ink price tag Post navigation This source of cheap components from the surplus market makes them ever more accessible, and we look forward to the projects that will come from them. These displays have started appearing in our community, not least in electronic conference badges. He has a quick overview video that we’ve placed below the break. The display itself turned out to be a custom model with a few quirks for price tags, it had a black border that could be enabled, and for some reason it appeared as a two-colour red-and-black model in which its black pixels responded as though they were the red channel. Since its interface was thus identified as SPI he could desolder the unknown CPU and break out the pins for an Arduino or other board. A pile of readily hackable e-ink displays lay before him, so he set to work.Ĭracking them open he found the display itself as well as a PCB with its own microcontroller, but he soon identified it as compatible with a WaveShare module for which he had data. Such a moment came for when he bought a quantity of used e-ink price tags (German, Google Translate link) that had formerly graced the shelves of a supermarket. Something which could previously be had only at a price is rendered down to mere pennies, and we are free to hack to our heart’s content. There’s always a magic moment for our community in the lifecycle of any piece of technology: the point at which it first becomes available for pennies on the surplus market.
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